641472193 has 2 divisors, whose sum is σ = 641472194. Its totient is φ = 641472192.

The previous prime is 641472133. The next prime is 641472233. The reversal of 641472193 is 391274146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 522945424 + 118526769 = 22868^2 + 10887^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641472193 is a prime.

It is a super-2 number, since 2×641472193² = 822973148784458498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641472133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320736096 + 320736097.

It is an arithmetic number, because the mean of its divisors is an integer number (320736097).

Almost surely, 2^641472193 is an apocalyptic number.

It is an amenable number.

641472193 is a deficient number, since it is larger than the sum of its proper divisors (1).

641472193 is an equidigital number, since it uses as much as digits as its factorization.

641472193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 641472193 is about 25327.3013366999. The cubic root of 641472193 is about 862.4341499261.

The spelling of 641472193 in words is "six hundred forty-one million, four hundred seventy-two thousand, one hundred ninety-three".